package cn.tedu.v6;

import java.io.*;
import java.net.*;
import java.util.*;


public class Client {
    private Socket socket;
    private String ip;
    private  static final String HOST="127.0.0.1";
    private static final Integer PORT=6666;
    private BufferedReader br;
    private PrintWriter pw;

    public Client() {
        try {
            socket=new Socket(HOST,PORT);
            br=new BufferedReader(new InputStreamReader
                    (socket.getInputStream(),"UTF8"));
            pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(), "UTF8")), true);
        } catch (NullPointerException e) {
            System.out.println("友情提示: IP传入错误导致链接失败~");
        } catch (UnknownHostException e) {
            System.out.println("友情提示: IP传入错误");
        } catch (ConnectException e) {
            System.out.println("客户端链接失败: 建议检查IP或者端口号");
        } catch (IOException e) {
            System.out.println("客户端链接服务器端失败，提示: 检查IP/端口");
        }
    }
    public void start() {
        System.out.println("~~~~~~欢迎来到空桑总动员牌聊天室~~~~~~");
        ip=socket.getInetAddress().getHostAddress();
        Scanner input=new Scanner(System.in);
        try {
            String serverMessage=br.readLine();
            System.out.println(serverMessage);
            String username=input.nextLine();
            pw.println(username);
            serverMessage=br.readLine();
            System.out.println(serverMessage);
            String password=input.nextLine();
            pw.println(password);
            serverMessage=br.readLine();
            if (serverMessage.startsWith("登录成功")){
                System.out.println("登录成功，欢迎进入聊天室");
                chat();
            }else {
                socket.close();
            }
        }catch (NullPointerException e){
            System.out.println("IO流传输对象，有对象为null,请立马核对。"
                    +"建议: 查看try块中对象可能赋值为null");
        } catch (IOException e){
            System.out.println("客户端断开链接!");
        }finally {
            if (br!=null) {
                try {
                    br.close();
                } catch (IOException e) {
                    System.out.println("客户端关闭异常~");
                }
            }
            if (pw!=null)
                  pw.close();
            if (socket!=null&&!socket.isClosed()){
                try {
                    socket.close();
                } catch (IOException e) {
                    System.out.println("客户端关闭出现异常");
                }
            }
        }
    }
    private void chat(){
        new Thread(()->{
            try {
                String message;
                while ((message= br.readLine())!=null){
                    System.out.println("服务器端说: "+message);
                    System.out.println("客户端请输入: ");
                }
            }catch (IOException e) {
                System.out.println("你的服务器端读入失败!");
            }
        }).start();

        Scanner input = new Scanner(System.in);
        while (true) {
            System.out.println(ip+"客户端请输入: ");
            String say=input.nextLine();
            pw.println("客户端说: "+say);
            if (say.equalsIgnoreCase("exit")){
                System.out.println("服务器端即将关闭...");
                System.exit(0);
            }
            pw.println("客户端说: "+say);
        }
    }
    public static void main(String[] args) {
        Client client=new Client();
        client.start();
    }
}
